Crushing machinery



Feb. 10; 1931- H. F. CAMPBELL CRUSHING MACHINERY Filed Jan; 17, 1950 2 Sheets-Sheet Feb. 10, 1931.

H F. CAMPBELL cgwsrmqe MACHINERY F'ilc'l Jan. 17, 1930 2 Sheets-Sheet 2 Patented Feb. 10, 1931 i UNITED STATES EN QFF E I HERBE iIT r. cAMrBELnor PHILADELPHIA, rE'N'n'srLvANm, nssIeNon mornnnsYn.

VANIA cnusnnn. CGMPANY, or new YORK, n: Y., A conrona'rron or NEW YORK onusnlne MACHINERY Application filed'Janua'ry 17, 1930. Serial No. 421,555.

My invention relates to crushing machinery of the type employing rotor structures carrying hammers which engage material delivered into their path and effect breakage or rupture thereof by beating the same against a break ing surface formingone wall or'part of one ation of reducing the same, a mass of highly viscous mud builds up on the breaker plate and seriously affects vthe capacity of breaking .machinery ofthis type.

2c The main object of my invention, therefore,

is to provide means that will prevent this building up of a body of sticky or slimy material or mud upon the breaking surface or breaker plate. a f A furtherobj ect of my invention is to provide a sliding member arranged to be moved over the breaking surface or breaker platew against which the material is hurled by the,

rotary beaters or hammers.

vide reciprocable scraper means movable across the faceof the breaking surface or breaker plate which will serve to keepthe same clean or substantially so during the crushing operation. Such means may comprise one or more bars substantially in con tact with the breaking surface during the reciprocating movements thereof.

A further object of my invention is to provlde amovable scraper bar having teeth on its Vlded Wlth a hammepcarrymg rotor Struc forward edge designed to cut through sticky material, mud and/ or the like,that may accumulate at a point beyond the normal travel of a plain scraper bar and out of the range of the heaters or hammers.

And a still further object of my invention is to provide flexible means for effecting re ciprocable movement of the scraper bar or blade over the breaking surface or breaker .plate. 1 V

,ence being had to the ingmachinery,-in the present instance I have...

A further object of my invention is to pro- These and other features of. my invention are-morefully described hereinafter; refer- I accompanying drawings, in which: i i o Figure 1 is a cross sectional view of oneform of crushing structure with which the features of my invention maybe employed; showinga movable scraper member associated with the breaking surface thereof.

, Fig. 2-is a front elevation of the structure illustrated in Fig. 1, and Y 7 Fig. 3 is a fragmentary View, in'elevation, illustrating a detail of my invention. I

While applicable to many forms of crushshown my improved reciprocating scraper construction as applied to crushing machinery of the type illustrated in the pending application of George lV.-Borton, filed August 25, 1928, Serial No. 302,080, in which the crushing chamber is providedwith' a series of grid bars. These grid bars when employedmaybe carried by or associated'with one walltof the crushing chamber so as to temporarily retard large massesof material to becrushed which are acted upon by the uprunning hammers as theypassbetween the grid bars.

In carrying out my present invention, I may associate with that part of the frame of the machine which may be termed the wall of the crushing chamber and indicated gener ally at '1, a series of wear plates 2, which may be secured to said wallin any appropriate manner, as by the bolts This breaking surface is inclined upwardly, partly over hanging the feed chamber and the rotor, and its lower portion may be curved to meet the curved wall of the crushing "chamber.

Crushing machinery oflthis type is pro- .Wall l of the crushing chamber may support a series of grid bars Q-bBt-WGGII which the hammers pass, although, it will be understood that such grid bars may be omitted iuthe in the present instance chains 11, and guidecleaning means in the, form of a reciprocat ing scraper member 10, which may be moved up and down over the breaker plate or the breaking surface while the material is being hurled against the same by the hammers.

In the construction ilhistrated in Figs. 1 and 2 of the drawings, a scraper blade is car ied at the lower ends of flexible members,

ways are provided for these chains in the form of guards 12 which may be carried by the side walls of the crushing structureand secured thereto by bolts '12. The upper ends of these chains are connected to reciprocable manner.

. clog the breaking surface when moving in "either direction. In order to increase the EX- tent of surface of the breaker plate operated upon by the scraping means, I may employ a plurality of these scraper bars, and in Figs.

rack bars 13 mounted in guide-ways 14, and motion maybe imparted to these rack bars by pinions 15 meshing therewith; such pinions being carried by a rock shaft 16 to which motion may be imparted in any suitable The scraper bar 10 may be provided with relatively sharp edges 10 and 10 on the upper. and lower portionsof the same, so as to effect removal of any material tending to 1 and 2 I have shown a bar 10 at the lower end of the chains 11 and another bar spaced a short distance above the same, indicated at y ma be altered, and that more than two scraper bars may be employed to keep the breaking surface clean, depending upon the extent of the same and the particular character of the material operated upon.

. Asmay be noted upon reference to Fig. 1

o'f'the drawings, the lower wear plate of the breaking surface, (to which the grid bars when employed may be secured), has a portion more or less unaffected by the scraping action and/or by the action of thehammers,

. which may tend to clog with the sticky or slimyportions of the material operated upon.

-With a view of removing as muchras possible any accumulation of mud and/or other material that may occur at this point, when grid bars are employed, I may provide a scraper bar having depending teeth 17, such as illustrated in-Fig. 3; which'teeth may extend between the grid'bars at their points of connection with the lower breaker plate or the wear plate support 2 connected thereto and still be clear of the hammers. These teeth are preferably tapered toward their points and in addition they may have relatively sharp sid'e'e d'ges. It will be understood of course that if the grid bars are omitted the lower scraper blade may have a movement of greater extent and pass over the wear plate indicated at 2 I The scraper bars may have a cross section substantially like that illustrated in Fig. 1, of the drawings or, if desired, the under side may be concaved so as to provide sharper edges. It will be understood, however, that I donot wish to be limited to this particular form of scraper bar, since other forms may be employed without departing from my inventi on the important pointbeing to provide a suitable form of reciproc'able scraper bar- 7 for operative engagement with the entire or substantially the entire breaking surface or the breaker plate and prevent objectionable accumulation thereon of mud and/or any sticky'or slimy portion (or portions) of the material operated upon.

g It will also be understood that if any condition arises where the material contains hard rock or other material that might tend todamage the scraper bars, the latter may be held out of action by stopping the reciprocating movement of the rack bars when the chains are at their upper limitpf travel; thereby holding the scraper blade or blades clear of the crushing zone.-

Iclaim: p I

1. The combination, in crushing machincry, of a rotor structure having hammers, a

breaking surface against which material undergoing crushlng may be thrownby the action of said hammers, and a scraper bar or blade movable across the face of said breaking surface.

The combination, in crushing machincry, of a rotor -structure having hammers, a

breaking surface against which material undergoing crushing may be thrown bythe action of said hammers, and a scraper bar vertically movable across the face of said breaking surface. 1

3. The combination, in crushing machinery, of a rotor structure having hammers, a breaking surface against which material undergoing crushing may he thrown by the action of said hammers, a scraper bar movable across the face of said breaking surface, and means for IQClPIOCtl-tihZSilld scraper bar.

4:. The combination, in crushing machincry, of a'rotcr structure having hammers, a breaking surface against which material undergoiing crushing maybe thrown by the action of said hammers, and a plurality of spaced scraper bars movable across the face of said breaking surface.

5. The combination, in crushing machini scraper bar.

'may be thrown by the actionqof the hammers, a slidable scraper bar overlying the,

breaking surface, and flexible means for reciprocating said scraping bar across said breaking surface. I

7. The combination, in crushing machinery, of a rotor structure having hammers, a breaking surface against which material undergoing crushing may be thrown by the action of the hammers, a slidable scraper bar having depending teeth overlying said breaking surface, and means for reciprocating said 8. The combination, in crushing machinery, of a rotorstructure having hammers, a breaking surface against which material undergoing crushing may be thrown by the action of the hammers, a plurality of slidable scraper bars overlying said breaking surface; one of said bars having depending teeth, and

means for reciprocating said scraper bars.

9. The combination, in crushing machinery, of a rotor structure having hammers, a breaker plate against which material undergoing crushing may be thrown by the action of said hammers, a' scraper bar, a pair of chains supporting said scraper bar, and means for imparting movement to said chains whereby the scraper bar may be reciprocated across the breaking surface.

10. The combination, in crushing machinery, of a rotor structure having hammers, a breaker plate against which material undergoing crushing may be thrown by the action of said hammers, a scraper bar, a pair of chains supporting said scraper bar, slidable rack bars connected to said chains, pinions engaging said rack bars, and means for imparting movement to said pinions whereby the scraper bar may be reciprocated across the breaking surface.

11. The combination, in crushing machin-c ery, of a rotor structure having hammers, a

breaker plate against which material undergoing crushing may be thrown by the action of said hammers, a scraper bar, a pair of chains supporting said scraper bar, guideways for said chains, slidable rack'bars connected to said chains, pinions engaging said rack bars, and means for imparting movement to said pinions whereby the scraper bar may be reciprocated across the breaking surface.

12. The combination, in crushing machinery, of a rotor structure having hammers, a

breaker plate against which material undergoing crushing may be thrown by the action of said hammers, a scraper bar, a pair of chains supporting said scraper bar, guideways for said chains, rack bars connected to said chains, housing guide-ways for said rack bars, pinions engaging said rack bars, and means for imparting movement to said pinions whereby the scraper bar may be reciprocated across the breaking surface.

13. The combination, in crushing machinery, of a rotor structure having hammers, a curved breaking surface against which material undergoing crushing may be thrown by the action of said hammers, a scraper bar.

movable across said curved breaking surface,

and driven chains connected to said scraper bar and serving to impart movement to the same.

'14. The combination, in crushing machinery, of a rotor structure having hammers, a curved breaking surface against which material undergoing crushing may be thrown by the action of said hammers, a scraper bar movable across said curved breaking surface, driven chains connected to said scraper bar for imparting movement thereto, and curved guide-ways disposed at the sides of the breaking surface for said chains.

15. The combination with a crushing machine of the rotary hammer type having a crushing chamber and a breaking surface c0- operating with the hammers for the crushing of material, of a scraper bar or blade movable over said breaking surface for the purpose of cleaning the same.

16. The combination with a crushing machine of the rotary hammer type having a crushing chamber and a breaking surface against which material undergoing crushing may be thrown by the action of the hammers, of a scraper bar or blade for cleaning said breaking surface and mounted for movement with respect to the same. a 1

17. The combination with crushing machinery of the rotary hammer type having a crushing chamber and a breaking surface cooperating with the'hammers in the crushing of material introduced into said crushing chamber, of a reciprocable scraper bar or blade mounted for movement over said break ing surface.

18. The combination with crushing ma.- chinery of the rotary hammer type having a crushing chamber and a breaking surface against which material undergoing crushing may be thrown by the action of the hammers, of a scraper bar or blade reciprocally movable over said breaking surface for the purpose of cleaning the same.

In witness whereof I have signed this specification.

HERBERT F. CAMPBELL. 

